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A stone propelled from a catapult with a speed of 50m/s attains a height of 100m.Calculate:(a)the time of flight?


    Just as long as anything else that goes up 100 meters and falls

    Which is twice as long as it takes to fall 100 meters

    h = (1/2) g t^2
    100 = 4.9 t^2
    t = 4.52 seconds to fall
    so about 9 seconds

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